linux-kernel - Re: Nvidia cable detection problems (was [PATCH] amd74xx: don't configure udma mode higher than BIOS did)

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Date:	Mon, 5 Feb 2007 23:00:18 +0100
From:	"Bartlomiej Zolnierkiewicz" <bzolnier@...il.com>
To:	Alan <alan@...rguk.ukuu.org.uk>
Cc:	"Tejun Heo" <htejun@...il.com>,
	"Allen Martin" <AMartin@...dia.com>, linux-ide@...r.kernel.org,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Nvidia cable detection problems (was [PATCH] amd74xx: don't configure udma mode higher than BIOS did)

On 2/5/07, Alan <alan@...rguk.ukuu.org.uk> wrote:
> > Since we are already using UDMA mode set by BIOS to determine if 80c cable
> > is present so why not also use it to determine if the 40c cable is present?
> >
> > I mean just ignoring AMD_CABLE_DETECT register for NVIDIA devices.
> >
> > 2-lines change and we wouldn't have to deal with ACPI at ell.
>
> And as I explained earlier you get false values. The existing hack is
> dodgy as well and breaks on suspend/resume then loading the driver for
> one. It's probably the best that can be done without ACPI but the ACPI
> _GTM/_STM methods are pretty clean so its not hard to use them. You need
> them for full suspend/resume support anyway.

OK
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